The output impedance of the noninverting amplifier with negative feedback is given by the formula:
Zout = Zin/(1+AB)
where A is the open-loop gain of the op-amp, B is the voltage divider ratio of the feedback network (r2/(r1+r2)), and Zin is the input impedance of the op-amp.
Substituting the given values, we get:
Zout = 1MΩ/(1+200,000×(10kΩ/(10kΩ+10kΩ)))
Zout = 454.55 Ω
Therefore, the output impedance of the noninverting amplifier with negative feedback is approximately 454.55 Ω.
In Noninverting Amplifier, the op-amp parameters are given as follows:
A = 200,000, Zin = 1MΩ and Zout=100Ω.
Calculate the amplifier output impedance (with negative feedback)
r1 = 10kΩ
r2 = 10kΩ
1 answer